Papal States (1740-42) 1/2 scudo d'oro Fr-233

This scarce type is listed for 1740-42 and 1751 along with some undated specimens (shown here). The SCWC lists this issue as debased gold but this coin does not show the greenish toning one would expect. The first specimen was lot 3540 in Sincona sale 43 (Zurich, October 2017), where it did not sell. The catalog description[1] noted,